:root {
  --bg: #f8fafc; --surface: #ffffff; --surface-hover: #f1f5f9;
  --border: #e2e8f0; --text: #0f172a; --muted: #64748b;
  --accent: #2563eb; --green: #16a34a; --orange: #d97706; --red: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a; --surface: #1e293b; --surface-hover: #334155;
    --border: #334155; --text: #f1f5f9; --muted: #94a3b8;
    --accent: #3b82f6; --green: #22c55e; --orange: #d97706; --red: #ef4444;
  }
}

/* Override for Telegram Web App theme */
body.dark-theme {
  --bg: #0f172a; --surface: #1e293b; --surface-hover: #334155;
  --border: #334155; --text: #f1f5f9; --muted: #94a3b8;
  --accent: #3b82f6; --green: #22c55e; --orange: #d97706; --red: #ef4444;
}

body.light-theme {
  --bg: #f8fafc; --surface: #ffffff; --surface-hover: #f1f5f9;
  --border: #e2e8f0; --text: #0f172a; --muted: #64748b;
  --accent: #2563eb; --green: #16a34a; --orange: #d97706; --red: #dc2626;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg); color: var(--text);
  padding: 0; min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.client-topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.client-logo { font-size: 18px; font-weight: 700; }
.client-logo small { font-size: 12px; font-weight: 400; color: var(--muted); }
.client-topbar-right { display: flex; align-items: center; gap: 12px; }
.client-user { font-size: 13px; color: var(--muted); }

.container { max-width: 800px; margin: 0 auto; padding: 24px; }

h1 { font-size: 24px; margin-bottom: 20px; }
h2 { font-size: 18px; margin: 24px 0 12px; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px; margin-bottom: 12px;
}

.skill-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }

.skill-card-client {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.skill-card-client.connected { border-color: var(--green); background: rgba(34,197,94,0.05); }
.skill-card-client h3 { font-size: 15px; display: flex; align-items: center; gap: 8px; }
.skill-card-client p { font-size: 13px; color: var(--muted); line-height: 1.5; }

.badge-connect {
  display: inline-block; padding: 4px 10px; border-radius: 6px;
  font-size: 12px; font-weight: 600;
}
.badge-connected { background: rgba(34,197,94,0.15); color: var(--green); }
.badge-disconnected { background: rgba(148,163,184,0.15); color: var(--muted); }

.btn {
  display: inline-block; padding: 8px 16px; border-radius: 8px;
  font-size: 13px; font-weight: 600; border: none; cursor: pointer;
  text-decoration: none; text-align: center;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { opacity: 0.9; text-decoration: none; }
.btn-danger { background: var(--red); color: white; }
.btn-danger:hover { opacity: 0.9; text-decoration: none; }
.btn-outline { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--surface-hover); text-decoration: none; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--muted); }
.form-group input, .form-group textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 14px;
}
.form-group input:focus, .form-group textarea:focus, .form-select:focus {
  outline: none; border-color: var(--accent);
}
.form-group textarea { min-height: 120px; font-family: monospace; font-size: 12px; }

.form-select {
  width: 100%; padding: 10px 14px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 14px;
  appearance: auto; cursor: pointer;
}
.form-select option { background: var(--surface); color: var(--text); }

.spinner-sm {
  width: 20px; height: 20px;
  border: 2px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
  vertical-align: middle;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

@keyframes spin { to { transform: rotate(360deg); } }

.login-box {
  max-width: 400px; margin: 80px auto;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px; text-align: center;
}
.login-box h1 { font-size: 22px; margin-bottom: 8px; }
.login-box p { color: var(--muted); font-size: 14px; margin-bottom: 20px; line-height: 1.5; }

.success-msg {
  padding: 10px 14px; border-radius: 8px; margin-bottom: 16px;
  background: rgba(34,197,94,0.1); color: var(--green); border: 1px solid rgba(34,197,94,0.3);
  font-size: 13px;
}

/* File upload widget */
.file-upload-area {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
}
.file-upload-area:hover { border-color: var(--accent); background: rgba(59,130,246,0.05); }
.file-upload-area.drag-over { border-color: var(--green); background: rgba(34,197,94,0.05); }
.file-input-hidden { display: none; }
.file-upload-placeholder, .file-upload-preview {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.file-upload-icon { font-size: 32px; }
.file-upload-text { font-size: 14px; font-weight: 600; color: var(--text); }
.file-upload-hint { font-size: 12px; color: var(--muted); }
.file-upload-filename { font-size: 13px; font-weight: 600; color: var(--green); word-break: break-all; }
.file-upload-size { font-size: 11px; color: var(--muted); }

.guide-box {
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.3);
  border-radius: 10px; padding: 14px 18px;
  font-size: 13px; line-height: 1.6; color: var(--text);
  margin-bottom: 16px;
}

.footer { text-align: center; padding: 24px; color: var(--muted); font-size: 12px; }